How did Saskatchewan and Ottawa previously have the same Roughrider name in football?

Question

How did Saskatchewan and Ottawa previously have the same Roughrider name in football?

Answer 1

weren't there more than one "blue bombers" too?

Answer 2

Each team played in different leagues originally so at the time that each team was formed they were the only team in their league with the name. When the 2 leagues joined together the teams kept their names. Saskatchewan spelled their name as one word while Ottawa was 2 words (Rough Riders).

Answer 3

Many years ago the Ottawa Rough Riders and the Regina Roughriders (notice the difference in spelling?) belonged to 2 different leagues.  The Regina 'Riders changed their name to Saskatchewan in 1950 and a few years later the 2 separate leagues merged and both teams were allowed to keep their deeply entrenched nicknames.